The front sight mounts on the same
plane as the rear and uses standard hardware.

YHM's Quick Deploy Sight System
features an automatic deploy system that springs the sight up with the push of
a button. Both front and rear sights lock positively in the folded and deployed
positions and are made from aircraft quality aluminum and Hardcoat Anodized matte
black to Military Specifications or better. When folded the sight measures just
.435 inches from the rail.